22
16. TROUBLESHOOTING
PROBLEM POSSIBILE CAUSE SOLUTION
The thermostat does not turn on
The system does not start/does not
start at the preset time
1. Low batteries
2. Batteries improperly installed
3. False contact
4. Wrong wiring
5. Wrong program setting
6. OVERRIDE mode is on
7. Wrong summer/winter setting
8. Wrong current time setting
1. Replace batteries
2. Check for proper polarities
3. Press reset (
R)
4. Check the wiring of the load with
the terminals of the thermostat
(#1 and #2)
5. Check the proper time setting in the
program (ex: micro-switch #7
activates the boiler from 7:00 to
7:59 a.m.)
6. Disable the mode at issue
7. Make sure that the display shows
the symbol “igloo” (if connected to a
boiler) or the symbol “sun” (if
connected to an air-conditioner)
8. Check the current time and, if
wrong, reset it
LIBR. DUO PLUS INGLESE standard 24-01-2000 14:46 Pagina 23
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